/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets;

import com.util.Conectar;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author victor
 */
public class imagen extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("imagen/pjpeg"); //imagen/pjpeg
        PrintWriter out = response.getWriter();
        try {
            String id = (String) request.getParameter("n");


            Connection conexion = null;
            PreparedStatement selectStatement = null;
            try {
                conexion = Conectar.getConnection();
                String selectCustomerStr = "SELECT * FROM uploads " +
                        "WHERE UPLOADID = ?";

                selectStatement = (PreparedStatement) conexion.prepareStatement(selectCustomerStr);

                selectStatement.setString(1, id);
                ResultSet rs = selectStatement.executeQuery();

                System.out.println("1");

                if (rs.next()) {
                    //System.out.println(rs.getBlob("BINARYFILE"));
                    byte[] ima = rs.getBytes("BINARYFILE");
                    System.out.println("Tamano  n: " + ima.length);
                    System.out.println("2");

                    response.setContentType("image/jpeg");
                    response.setContentLength(ima.length);
                    OutputStream o = response.getOutputStream();
                    o.write(ima);
                    o.flush();
                    o.close();

                }
                rs.close();

            } catch (NamingException ex) {
                ex.printStackTrace();
            } catch (SQLException ex) {
                ex.printStackTrace();
            } finally {
                try {
                    if (selectStatement != null) {
                        selectStatement.close();
                    }
                    if (conexion != null) {
                        conexion.close();
                    }
                } catch (SQLException e1) {
                    e1.printStackTrace();
                }
            }

        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
